The former Editor in Chief, I believe, for Marvel Comics. During 2007, in order to fix flagging sales for Spider-Man comics due to well, comics have always had mediocre sales in recent years, he ended the marriage between Spider-Man and his wife, a marriage that had been going on for well over a decade, I think...
Uh, basically he had Spider-Man make a deal with Marvel's version of Satan by negating his marriage to save his aunt from Cancer, which had the results of reviving a few villains and supporting casts who died, and negating Spider-Man's public reveal to the entire world that he was Peter Parker during the "Civil War" event.
While the reboot helped strengthen sales and increase reader interest, there are many who think that the entire Satan deal arc, "One More Day", was a pretty retarded move on Quesada's part and was a pretty stupid way of doing it, and aborted a really possibly interesting aftermath of Spider-Man dealing with the public knowing who he was.
And this was on top of a series of other bizarre moves that pretty much were "Break Up Marriages for some reason".
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